Thai Siam Main Menu Lunch Menu Lunch Served Mon-fri, 11:30am-3pm (Except Holidays) (All lunch combinations served with salad and rice) Add Phad Thai $2.00 extra   LC 1. CHICKEN DELIGHT Price: $8.95 Sauteed chicken with onions, bell peppers and cashew nuts. LC 2. BEEF OYSTER SAUCE Price: $8.95 Sauteed beef with mushrooms, onions and oyster sauce.